Detroit Diesel 671 Video

March 27, 2025

Detroit Diesel 6-71 Engine Variants – Specifications & Applications


Overview


Detroit Diesel 6-71 Non-Turbo – 2-Valve Head Type


Technical Specifications


Applications


Detroit Diesel 6-71 Non-Turbo – 4-Valve Head Type


Technical Specifications


Applications


Detroit Diesel 6-71 Turbocharged (6-71T)


Technical Specifications


Applications


Side-by-Side Comparison Table


Choosing the Right Variant


When to Choose 2-Valve Non-Turbo


When to Choose 4-Valve Non-Turbo


When to Choose Turbocharged 6-71 (6-71T)


Additional Resources For The Detroit Diesel 6-71:


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Detroit Diesel 671 Video

Detroit Diesel 671 Longblock W_ Blower & Freshwater Pump Video

March 27, 2025

Why You Should Buy Detroit Diesel 6-71 Parts From Diesel Pro Power


Experience, Reliability, and Worldwide Support for One of the Most Iconic Engines Ever Built


 


A Supplier Dedicated to Detroit Diesel Engines


Complete Parts Coverage in One Place


Same-Day Shipping to 180 Countries


Parts You Can Trust—Quality You Can Count On


A Proven Track Record With Thousands of Customers


Keep Your Detroit Diesel 6-71 Running Strong


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Detroit Diesel 671 Longblock W_ Blower & Freshwater Pump Video

Old School Detroit Diesel 2 Valve 671 Cylinder Head (1) Video

March 27, 2025

The Evolution of the Detroit Diesel 6-71 Cylinder Head: From 2-Valve to 4-Valve, and Why the 2-Valve Still Matters


The Original 2-Valve Cylinder Head: A Design Born for Durability


Why a 2-Valve Design Made Sense


1. Simplicity


2. Ruggedness


3. Predictable Airflow for a Two-Stroke Engine


4. Compatibility With Early Fuel Systems


5. Ideal for Broad Applications


The Push for More Power: Why Detroit Diesel Transitioned to the 4-Valve Cylinder Head


What Changed with the 4-Valve Design?


1. Faster, More Efficient Airflow


2. Higher Horsepower Potential


3. Better Performance at High RPM


4. Improved Fuel Economy


5. Cleaner and More Complete Combustion


The Trade-Offs


Why Many Operators Still Prefer the 2-Valve Head Today


1. Proven Reliability in Marine Service


2. Lower Maintenance Costs


3. Wide Availability of Parts


4. Original Engine Configuration


5. Lower Conversion Costs


6. Predictable Performance


The Importance of Rebuilt 2-Valve Heads for the Detroit Diesel 6-71


Why Rebuilt Heads Are Essential


Diesel Pro Power’s Role in Supporting 2-Valve 6-71 Engines


What Diesel Pro Power Offers


Why Operators Trust Diesel Pro Power


The Lasting Legacy of the 2-Valve 6-71 Engine


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Old School Detroit Diesel 2 Valve 671 Cylinder Head (1) Video

Brand New Cylinder Head W_ Springs & Valves (Detroit Diesel 671) Video

March 27, 2025

Why Fleet Managers Choose a Complete Cylinder Head With Valves & Springs for Detroit Diesel Engines—And Why Diesel Pro Power Is the Smart Source


1. Downtime Is the Most Expensive Factor—and Complete Heads Eliminate Weeks of Delay


2. A Fully Assembled Head Reduces Labor Cost and Technician Burden


3. Eliminates Risk of Improper Assembly—One of the Leading Causes of Early Failure


4. One Vendor, One Shipment, One Solution—Not a Patchwork of Parts


5. Diesel Pro Power Offers Marine- and Industrial-Grade Quality—Not Generic Aftermarket Assembly


6. Complete Heads Reduce Rebuild Variability Across a Fleet


7. Predictable Installation Saves Time During Emergency Repairs


8. Diesel Pro Power Offers Deep Inventory and Fast Global Shipping


9. Cost Efficiency Isn’t About the Cheapest Part—It’s About the Lowest Total Cost of Ownership


10. Diesel Pro Supports Legacy Engines With Industry-Leading Expertise


Conclusion: Complete Cylinder Heads From Diesel Pro Power Give Fleet Managers Reliability, Speed, and Predictability


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Brand New Cylinder Head W_ Springs & Valves (Detroit Diesel 671) Video

Starting Up 671 Turbocharged Detroit Diesel Engine…Aboard Tugboat ElizabethH-H – Hempstead Marine Video

March 27, 2025

The Detroit Diesel 6-71: A Legendary Tugboat Engine


Why the 6-71 Became a Tugboat Workhorse


1. Incredible Low-End Torque for Tow and Push Operations


2. Unmatched Reliability in Continuous-Duty Marine Service


3. Simple, Field-Serviceable Marine Power


4. Compact Power for Tight Tugboat Engine Rooms


5. Parts Availability and Long-Term Support


Real-World Marine Applications of the 6-71


Why the 6-71 Remains in Service Today


The Role of Diesel Pro Power in Keeping 6-71 Tugboat Engines Alive


Conclusion: The Detroit Diesel 6-71 Is a Tugboat Legend — And Diesel Pro Power Keeps It Running


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Starting Up 671 Turbocharged Detroit Diesel Engine…Aboard Tugboat ElizabethH-H – Hempstead Marine Video

Bare Cylinder Head For Detroit Diesel 671 Video

March 27, 2025

Bare Cylinder Heads for Detroit Diesel 6-71 Engines


Understanding the Function of a Bare Cylinder Head


1. Exhaust Valve Support


2. Injector Mounting and Alignment


3. Heat Management


4. Combustion Chamber Sealing


The 2-Valve Non-Turbo Detroit Diesel 6-71 Cylinder Head



Features of the 2-Valve Head


Why Replacement Bare Heads Are Needed Today


The 4-Valve Non-Turbo Detroit Diesel 6-71 Cylinder Head


What Makes the 4-Valve Head Different?


Applications for 4-Valve 6-71 Engines


The Turbocharged Detroit Diesel 6-71 Bare Cylinder Head



Turbo 6-71 Cylinder Head Characteristics


Why Turbo Engines Require High-Quality Heads


Benefits of Choosing a Bare Head Instead of a Rebuilt Assembly


Why Buy Your 6-71 Bare Cylinder Heads from Diesel Pro Power?


Experience with Detroit Diesel Two-Stroke Engines


Multiple Head Options In Stock


Support for Marine, Industrial, and Generator Applications


Quality You Can Trust


Final Thoughts


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Bare Cylinder Head For Detroit Diesel 671 Video